ONATE BRIDGE AMENDMENT NO. 1

This emergency amendment contracts AUI Inc. to perform interim scour‑stabilization and associated hydraulic improvements on the Oñate Street Bridge (Bridge #1836) at Pier 10. The work is required because severe under‑river scour threatens the bridge’s structural integrity, and construction must be completed before spring runoff (~1,500 cfs) makes in‑river work impossible. The amendment expands the original scope to add bypass relief channels, increase disturbed area, and enhance erosion‑control measures, bringing the total contract value (including General Reimbursable Tax) to $1.96 million for a ten‑month period. • Scope: excavation of new relief channels (P7‑P9), spoil hauling, expanded storm‑water pollution prevention plan, and additional BMPs (straw wattles, seeding, restoration). • Budget: Revised NTE $1,960,846.40 (original $1,517,750.00 plus $443,096.40 amendment). • Timeline: Start 27 Jan 2026, finish 26 Nov 2026; construction targeted for completion by mid‑May 2026 to avoid high spring flows.